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A hemispherical window (or viewport) in a decompression chamber (see figure) is subjected to an internal air pressure of 80 psi. The port is attached to the wall of the chamber by 18 bolts
Find the tensile force F in each bolt and the tensile stress σ in the viewport if the radius of the hemisphere is 7.0 in. and its thickness is 1.0 in
the field-circuit resistance and armature-circuit resistance of a 10-hp 115-v motor are 90 ohms and 0.08 ohms
a vapor compression refrigetarion cycle has a theoretical cop of 4.8 and provides 120000 btuh of cooling. the
an electric current of 0.25 a flows through a 5-ohm electrical resistor placed in an evacuated chamber. the resistor is
A control system consists of an electrical power supply, a standby battery supply which is activated by a sensor and switch if the main supply fails, a hydraulic power pack, a controller, and two actuators acting in parallel
12.0-V battery for a cordless drill can supply 3.3 A of current. If the drill is continuously operated for 6 min, what is the total charge passing through the battery? What total amount of work does the battery do on the charge during these 6 min?
The combustion products also include H2O, H2 and N2, exit the exhaust at 1000 K. Heat loss from the engine (primarily to the cooling water) is 120 kW. What is the power output of the engine? What is the thermal efficiency?
Using shock-expansion theory to design a diamond shaped airfoil with semi-angle of ε = 15° and can produce at least 1500 lb of lift force per foot of span with an angle of attack of 5°. The upstream Mach number is 2.0 and the upstream pressure is 2..
a major automotive company is considering an agreement with a small manufacturer whereby it would be required to make
Steels and low carbon iron alloys are by far the most common metals in industrial use. The main element of these materials is iron (Fe). Fe has a BCC crystal structure. Show for Fe the unit cell edge length a and the atomic radius R are related throu..
The 60-W fan of a central heating system is to circulate air through the ducts. The analysis of the flow shows that the fan needs to raise the pressure of air by 50 Pa. The fan is located in a horizontal flow section whose diameter is 30 cm at both t..
A piston cylinder contains 0.1 kg air at 300 K and 100 kPa. The air is now slowly compressed in an isothermal (constant temperature) process to a final pressure of 250 kPa. Air is assumed as ideal gas; the gas constant of air is R = 0.287 kJ/kg-K .
a bucket packed with 12 - inch diameter steel balls weighs 50 pound. when packed with 116-inch diameter steel balls the
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